A randomized controlled trial of 161 patients with major depressive disorder and obesity found that adding simvastatin to escitalopram provided no additional antidepressant benefits compared to placebo.
Despite reducing cardiovascular risk markers including LDL cholesterol, total cholesterol, and C-reactive protein levels, simvastatin showed no effect on depression scores measured by the Montgomery-Åsberg Depression Rating Scale.
The findings contradict earlier smaller studies suggesting statin antidepressant effects, with researchers concluding that statins should be prescribed for cardiovascular indications only, not for treating depression.
An updated meta-analysis revealed that previous positive results were driven primarily by smaller, lower-quality studies, while larger, well-designed trials consistently showed no antidepressant benefit.